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Last spring, our class had a spring trip. We got on the bus at 8: 00. After half an hour, we got to the zoo. Then we visited the zoo. There were different kinds of animals there, and we were all excited. At eleven o'clock, we began to make dumplings, and we had our lunch at 12: 00. After we had a rest, we rowed a boat at 14: 00. Two hours later we took pictures, sang and danced together. We had a very good time!
1．Last autumn, the class had a trip.2．In the morning, they visited the zoo.
3．They were excited to see different kinds of animals there.
4．They made dumplings at 12 o'clock.
5．In the afternoon, they took pictures.
同类型试题
y = sin x， x∈R， y∈[–1，1]，周期为2π，函数图像以 x = (π/2) + kπ 为对称轴
y = arcsin x， x∈[–1，1]， y∈[–π/2，π/2]
sin x = 0 ←→ arcsin x = 0
sin x = 1/2 ←→ arcsin x = π/6
sin x = √2/2 ←→ arcsin x = π/4
sin x = 1 ←→ arcsin x = π/2
y = sin x， x∈R， y∈[–1，1]，周期为2π，函数图像以 x = (π/2) + kπ 为对称轴
y = arcsin x， x∈[–1，1]， y∈[–π/2，π/2]
sin x = 0 ←→ arcsin x = 0
sin x = 1/2 ←→ arcsin x = π/6
sin x = √2/2 ←→ arcsin x = π/4
sin x = 1 ←→ arcsin x = π/2
